java

package com.example.observability;

public final class CorrelationIdConstants {

    public static final String HEADER_NAME = "X-Correlation-Id";
    public static final String MDC_KEY = "correlationId";

package com.shop.orders.events;

import java.math.BigDecimal;
import java.time.Instant;

public record OrderPlacedEvent(

package com.example.tracing;

import jakarta.servlet.Filter;
import jakarta.servlet.FilterChain;
import jakarta.servlet.ServletException;
import jakarta.servlet.ServletRequest;

-- KEYS[1] = bucket key
-- ARGV[1] = capacity, ARGV[2] = refill_rate (tokens/sec)
-- ARGV[3] = now_ms, ARGV[4] = requested tokens
local capacity    = tonumber(ARGV[1])
local refill_rate = tonumber(ARGV[2])
local now_ms      = tonumber(ARGV[3])

package com.example.demo.controller;

import com.example.demo.dto.UserDTO;
import com.example.demo.dto.v2.UserDTOV2;
import com.example.demo.service.UserService;
import org.springframework.web.bind.annotation.*;

package com.example.demo.aspect;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.slf4j.Logger;

package com.example.demo.examples;

import java.util.*;
import java.util.stream.Collectors;

public class StreamExamples {

package com.example.demo.service;

import io.github.resilience4j.circuitbreaker.annotation.CircuitBreaker;
import io.github.resilience4j.ratelimiter.annotation.RateLimiter;
import io.github.resilience4j.retry.annotation.Retry;
import io.github.resilience4j.bulkhead.annotation.Bulkhead;

import java.time.Duration;
import java.util.concurrent.ThreadLocalRandom;
import java.util.function.Predicate;

public final class RetryPolicy {
    private final int maxAttempts;

import jakarta.persistence.*;
import java.math.BigDecimal;
import java.util.Objects;

@Entity
@Table(name = "accounts")